I have a switchlinc dimmer that has suddenly stopped responding to my ISY.  The interesting thing is that it still responds to scenes properly but ISY flags it as unable to communicate with the message:

"Cannot Communicate With 38 E0 DD 1. Please check connections."

I've tried restore device to no avail.  Tried a factory reset as well, and ultimately ended up at the same spot.

Here's the log where it failed trying to write dbAddr=0x4008.

Fri 02/01/2019 09:15:05 PM : [INST-TX-I2CS] 02 62 38 E0 DD 1F 2F 00 00 00 00 00 01 00 00 00 00 00 00 00 00 D0
Fri 02/01/2019 09:15:05 PM : [INST-ACK    ] 02 62 38.E0.DD 1F 2F 00 00 00 00 00 01 00 00 00 00 00 00 00 00 D0 06        (00)
Fri 02/01/2019 09:15:14 PM : [INST-TX-I2CS] 02 62 38 E0 DD 1F 2F 00 00 00 00 00 01 00 00 00 00 00 00 00 00 D0
Fri 02/01/2019 09:15:14 PM : [INST-ACK    ] 02 62 38.E0.DD 1F 2F 00 00 00 00 00 01 00 00 00 00 00 00 00 00 D0 06        (00)
Fri 02/01/2019 09:15:23 PM : [INST-TX-I2CS] 02 62 38 E0 DD 1F 2F 00 00 00 00 00 01 00 00 00 00 00 00 00 00 D0
Fri 02/01/2019 09:15:23 PM : [INST-ACK    ] 02 62 38.E0.DD 1F 2F 00 00 00 00 00 01 00 00 00 00 00 00 00 00 D0 06        (00)
Fri 02/01/2019 09:15:27 PM : [38 E0 DD 1  ] Memory : Write dbAddr=0x4008 [09] cmd1=0x20 cmd2=0x09
Fri 02/01/2019 09:15:27 PM : [INST-TX-I2CS] 02 62 38 E0 DD 1F 20 09 00 00 00 00 00 00 00 00 00 00 00 00 00 D7
Fri 02/01/2019 09:15:27 PM : [INST-ACK    ] 02 62 38.E0.DD 1F 20 09 00 00 00 00 00 00 00 00 00 00 00 00 00 D7 06        (09)
Fri 02/01/2019 09:15:36 PM : [INST-TX-I2CS] 02 62 38 E0 DD 1F 20 09 00 00 00 00 00 00 00 00 00 00 00 00 00 D7
Fri 02/01/2019 09:15:36 PM : [INST-ACK    ] 02 62 38.E0.DD 1F 20 09 00 00 00 00 00 00 00 00 00 00 00 00 00 D7 06        (09)
Fri 02/01/2019 09:15:45 PM : [INST-TX-I2CS] 02 62 38 E0 DD 1F 20 09 00 00 00 00 00 00 00 00 00 00 00 00 00 D7
Fri 02/01/2019 09:15:45 PM : [INST-ACK    ] 02 62 38.E0.DD 1F 20 09 00 00 00 00 00 00 00 00 00 00 00 00 00 D7 06        (09)
Fri 02/01/2019 09:15:49 PM : [38 E0 DD 1  ] Memory : Write dbAddr=0x4008 [09] cmd1=0x20 cmd2=0x09 - Failed
Fri 02/01/2019 09:15:49 PM : [D2D EVENT   ] Event [38 E0 DD 1] [ERR] [1] uom=0 prec=-1
Fri 02/01/2019 09:15:49 PM : [  38 E0 DD 1]      ERR   1

Has anyone else seen anything like this happen?  I'm assuming warranty claim.  Replacing this switch with another one in the same location shows no trouble at all.  Comms have always been good.

Yes its warranty time. I've seen some functions start failing while others continue working.

Paul